Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe08e76f2f8e8cf5…

MALICIOUS

PDF

82.3 KB Created: 2021-10-26 02:13:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 018ce5eb5ed8602da7dc5e866b454451 SHA-1: 335cf44267c3e18597698aacebb1a46864283c00 SHA-256: fe08e76f2f8e8cf551dca1f7e13d84687914986608c8567947d7683d0c51c80a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan PDF. It contains numerous embedded URLs pointing to various domains, many of which appear to be disposable or compromised, suggesting a link farm designed to redirect users to malicious sites. The presence of 'utm_term' parameters in some URLs further supports a phishing or spam campaign context.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://irlanc.ru/uplcv?utm_term=6+d%27s+of+disruption PDF link annotation
    • http://unstitchedfootwear.net/files/file/31952150410.pdfIn PDF document text
    • http://henskeschildersbedrijf.nl/upload/wapilategafuj.pdfIn PDF document text
    • https://on-the-markmarketing.onthemarkmarketing.com/userfiles/file/vejodirerawob.pdfIn PDF document text
    • https://cowik.pl/upload/vilopiforexareropimuvola.pdfIn PDF document text
    • http://sweet-sugar.de/images/uploadedimages/file/32994785520.pdfIn PDF document text
    • http://bakefruit.com/uploads/files/202109191003185526.pdfIn PDF document text
    • http://praguetransfer.com/files/file/64160752091.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/6c3d06158a7b13fc10f86b3a4ad4ffa5/vifodafem.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/16147ea1f8162a---27937951422.pdfIn PDF document text
    • https://russiancosta.ru/ckfinder/userfiles/files/70287653409.pdfIn PDF document text
    • https://megatekspb.ru/sites/default/files/uploads/zeveboga.pdfIn PDF document text
    • https://sapsda.com/SapmaUserfiles/file/lewofanujepuwobovoxazuji.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/b36cc7a93733571fb03acc5283044b50/5110499489.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1615a9923b86c1---mitagawozufaditux.pdfIn PDF document text
    • http://astmasme.com/userData/board/file/ludusexotijogekomo.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/6a0fdaf0ebfc2b4b6a33a7d5b61a46e0/46559688436.pdfIn PDF document text
    • http://duplisite.com/userfiles/file/30701306950.pdfIn PDF document text
    • http://dyglas.com/userData/board/file/kijerewowarevipepod.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614d974105ccf---novurebopuwupewiretuvako.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/luncbuaelbn1s8jlrci4g7m9h7/vawezedurunureta.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/161708a450b441---54975963663.pdfIn PDF document text
    • http://studioaba.net/userfiles/files/20410365039.pdfIn PDF document text
    • http://gddfboiler.com/uploads/files/52014224505.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/1613fb470220cc---dupikaku.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC6 10356 bytes
SHA-256: b6029e97fa84e9c86ce4c64683f77df21bc4c016473ce5d89d354971f8458948
font_01_sfnt_off0000f54b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF54B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010d5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D5D 17988 bytes
SHA-256: 9e822edc23ce67cbd3f294b4b8f2fb4e6ad21dd6b53b53a84897834a6e954ca4

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